L8-JP182井区高Ⅱ1-18小层储层特征研究

发布时间：2018-05-14 16:50

本文选题：高II组 + 沉积特征　；参考：《东北石油大学》2015年硕士论文

【摘要】：我国大部分油田经过多年的生产开发,早已进入高-特高含水期,油气分布比较复杂,储层特征的精细研究已经成为目前油田持续稳产的重点,对下一步指导油田开发有着重要意义。本文以喇嘛甸L8-JP182井区高II组1-18小层为例,结合试验区沉积背景,综合岩心资料、化验分析结果以及测井曲线等资料,在层序地层学、沉积学和储层地质学等理论指导下,对实验区目的层进行了沉积单元划分对比及沉积微相识别划分研究,将试验区GII1-18层共划分为20个沉积单元;确定试验区处于三角洲前缘环境,主要发育水下分流河道、河口坝、远砂坝、席状砂四种微相类型。在此基础上,对不同砂体的储层特征、储层性质影响因素进行了详细研究及综合评价,建立了渗透率、含油饱和度的测井解释模型,确定试验区目的层物性以中孔中渗为主。储层物性、分布规律、非均质性均受控于沉积演化规律和微相类型。垂向上,水进旋回末期、水退旋回早期物性较差,隔层相对发育,层间层内非均质性较强;反之,水进旋回早期,水退旋回末期物性较好,隔层相对不发育,层间层内非均质性相对较弱。不同微相砂体中,水下分流河道和河口坝物性相对最好,远砂坝以中低孔、低渗为主,物性最差。在储层精细研究基础上,对试验区目的层进行了综合评价,将储层划分为三类,III类储层是剩余油富集区,多位于分流河道、主体席状砂边部,薄层非主体席状砂和大部分表外储层等位置。通过对试验区储层特征及评价研究,确定了高含水时期剩余油潜力较大的储层分布规律,可有效指导研究区的剩余油挖潜工作。可为油田剩余油的开采和可持续发展奠定理论基础。
[Abstract]:After many years of production and development, most oil fields in China have already entered the period of high to very high water cut, the distribution of oil and gas is relatively complex, and the fine study of reservoir characteristics has become the focus of the sustained and stable production of oil fields at present. It is of great significance for the next step to guide the development of oil fields. In this paper, taking high-II formation 1-18 in Lamadian L8-JP182 well area as an example, combined with sedimentary background, comprehensive core data, laboratory analysis results and logging curves, under the guidance of sequence stratigraphy, sedimentology and reservoir geology, etc. In this paper, the sedimentary unit division and sedimentary microfacies identification of the target layer in the experimental area are studied. The GII1-18 layer in the experimental area is divided into 20 sedimentary units, and it is determined that the experimental area is in the delta front environment, which mainly develops underwater distributary channel, estuarine dam, and so on. Far sand dam, sheet sand four types of microfacies. On this basis, the reservoir characteristics of different sand bodies and the influencing factors of reservoir properties are studied in detail and comprehensively evaluated. A logging interpretation model of permeability and oil saturation is established, and the physical properties of the target layer in the experimental area are determined to be mesoporous and permeable. Reservoir physical property, distribution law and heterogeneity are controlled by sedimentary evolution law and microfacies type. In the early stage of the water regressive cycle, the physical properties are poor, the interlayer is relatively developed, and the heterogeneity in the interlayer is relatively strong. On the contrary, in the early stage of the water entry cycle, the physical properties of the late stage of the water regressive cycle are better, and the interlayer is relatively undeveloped. The heterogeneity in interlaminar layer is relatively weak. Among the different microfacies sand bodies, the underwater distributary channel and estuarine dam have the best physical properties. On the basis of fine reservoir research, a comprehensive evaluation of the target layer in the test area is carried out. The reservoir is divided into three types of reservoirs, which are the remaining oil rich areas, mostly located in distributary channels, and the main bedding sand edge. The thin layer of non-main sheet sand and most of the off-surface reservoirs are in the same position. Based on the study of reservoir characteristics and evaluation in the experimental area, the distribution law of remaining oil with great potential in high water cut period is determined, which can effectively guide the research area to tap the remaining oil potential. It can lay a theoretical foundation for the exploitation and sustainable development of remaining oil in oil field.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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